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Investigators believe Andrea L. Kruger, 33, was on her way home from work when she was shot and killed near 168th and Fort streets around 2 a.m. Wednesday. Her SUV was found about 16 hours later near 43rd and Charles streets.

At a news conference Friday afternoon, Dunning read through a list of safety tips for the public because investigators believe Kruger's death was random.

“I know that there’s a fear out there because obviously we have a killer on the loose," Dunning said.

Among the safety tips Dunning shared, the sheriff warned the public to be aware of their surroundings and not to take any unnecessary risks.

"If you don't follow these tips, you could be a victim in the near future," Dunning said.

While authorities have recovered Kruger’s SUV, they have not located a vehicle that witnesses reported seeing leaving the scene where the woman’s body was found.

Dunning said the suspect(s) made a "feeble attempt" to start a fire inside Kruger's vehicle, likely to destroy any evidence.

"I use the word feeble because the fire went out nearly as quickly as it started," Dunning said. "The law of physics would not allow the fire to continue."

Dunning said investigators believe Kruger's SUV was abandoned about 2 1/2 hours after the homicide. He said nothing of evidentiary value was found in a search of the area around the vehicle and the roof of a nearby business.

Investigators are reviewing surveillance video from businesses along the route Kruger would have taken home from work. Dunning said they have spotted Kruger's vehicle in some video.

Dunning was careful not to reveal too many specifics on the investigation, only saying that its successful conclusion is their highest priority.

Anyone with information on the case should call 402-444-6000. Tipsters can remain anonymous and be eligible for a cash reward.

Some of the personal safety tips the sheriff shared Friday:

- Be alert to your surroundings- Trust your instincts and do not take unnecessary risks- When possible, park directly in front of the main entrance or windows of a business-Never walk to your vehicle alone, use the buddy system- Plan an escape route ahead of time in case it is needed- Be suspicious of anyone you do not know- Report any threats or suspicious activity to 911 immediately- Do not give rides to strangers or hitchhikers- Never exit your car for strangers- Keep your doors locked at all times- Avoid isolated and dimly lit areas- Stay on main roadways- Stay on roadways you are familiar with- Carry a cellphone and have it readily accessible- Have your car keys out when walking to your car for quick entry and then lock the doors behind you- Do not carry too many items in your hands, keep your hands free to defend yourself- If attacked, use your car's alarm, horn or simply scream in order to create attention to your situation- If unsure if an actual law enforcement officer is stopping you: A) Turn on your hazard lights, B) Proceed at the speed limit to a well-lit and populated area such as a business or actual police or fire station, C) Look for an official uniform, D) Do not exit your vehicle until you are sure it is an actual law enforcement officer, E) Call 911 if you are still unsure of the identity of someone stopping you- If being robbed, give up personal property without retaliating